Meanings

pork-barrel politician

family vacation

ethnic discrimination

Hui (Islamic ethnic minority group of China)

Zhuang (Chinese ethnic minority group)

platinum group metals

nitrogen group (group 15 of the periodic table)

Austro-Asiatic languages

Altaic (family of languages)

Niger-Kordofan (family of languages)

Afroasiatic languages

Sino-Tibetan (family of languages)

Hamito-Semitic (family of languages)

Dravidian (family of languages)

homologous series

Malayo-Polynesian languages

Uralic (family of languages)

Hamitic (hypothetical family of languages)

Austronesian languages

royalty